/Engine/Plugins/Runtime/ProceduralMeshComponent/Source/ProceduralMeshComponent/Public/ProceduralMeshComponent.h
Updates a section of this procedural mesh component. This is faster than CreateMeshSection, but does not let you change topology. Collision info is also updated. This function is deprecated for Blueprints because it uses the unsupported 'Color' type. Use new 'Create Mesh Section' function which uses LinearColor instead.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Components|ProceduralMesh", Meta=(DeprecatedFunction, DeprecationMessage="This function is deprecated for Blueprints because it uses the unsupported 'Color' type. Use new 'Update Mesh Section' function which uses LinearColor instead.", DisplayName="Update Mesh Section FColor", AutoCreateRefTerm="Normals,UV0,VertexColors,Tangents")) void UpdateMeshSection ( int32 SectionIndex, const [TArray](API\Runtime\Core\Containers\TArray)< FVector > & Vertices, const [TArray](API\Runtime\Core\Containers\TArray)< FVector > & Normals, const [TArray](API\Runtime\Core\Containers\TArray)< FVector2D > & UV0, const [TArray](API\Runtime\Core\Containers\TArray)< [FColor](API\Runtime\Core\Math\FColor) > & VertexColors, const [TArray](API\Runtime\Core\Containers\TArray)< [FProcMeshTangent](API\Plugins\ProceduralMeshComponent\FProcMeshTangent) > & Tangents )